US712933A

US712933A - Type-writing machine.

Info

Publication number: US712933A
Application number: US8224998A
Authority: US
Inventors: Harold Jarvis; Manley H Blakeslee
Original assignee: JARVIS TYPE WRITER AND TABULATOR Co
Current assignee: JARVIS TYPE WRITER AND TABULATOR Co
Priority date: 1898-05-16
Filing date: 1898-05-16
Publication date: 1902-11-04
Anticipated expiration: 1919-11-04

Description

No.' 7|2,933. y Pafented Nov. 4, i902.

H. JARvls & M. H. BLAKESLEE.

TYPE WRITING MACHINE.

(Application filed May 16, 1898. Renewed Nov. 14, 1901.)

(No Model.) 7 SheeIs-Shee I.

III

" "man" Patented Nov. 4, |902. H- Jlmvls & M. H. BLAKESLEE.

TYPE` WRITING MACHINE.

' (Application led May 16, 1898. Renewed Nov. 14, 1901,)

7 Sheets-Sheet 2.

(No Mndel'.)

"140. 7|2,933. Patented Nov. 4, |902'.

` H. JARVIS & M.- H. BLAKESLEE.

TYPE wmTmG MACHINE.

(Auulication led May 1B; 1898. Renewed Nov. 414, 1901.) (No Model.) 7 Sheets-Sheet 3.

No. 7I2,933.

Patented Nov. 4, |902. H. J'ARV'IS & M. H. BLAKESLEE.

TYPE wIIITIIIG MACHINE.

(Applica'tion med my 1e, 189s. mnewed Nov. 14, 1901.)

(No Model.)-

7 Sheets-Sheet 4.

TH: Norms Pinus co. Puonumo.. wAsHmsYomp. I:y

no. 7|2,933..` K Patented Nov.4,"|902. lH. JAvls & M..H. BLAKESLEE...

TYPE WRITING MACHINE. Y (Application mea my 1e, mms. mnewea Nav. 114, 1901.1 (nq Model.) 7 sheets-sheet `-5.

Y No. 7|2,93s. 'Patented Nov. 4,1902. H. JAnvls & M.A H. BLAKESLEE.

TYPE WRITING MACHINE., (Appliatio tiled May 16,41898. Renewedl Nov. 14, 1901.)

75mm-sheet s. v

LeSsC-.TS ZM f Unirse Freres Artnr Ormes.

HAROLD .IARVIS AND MANLEY I-I. ILAKESLEE, OIF BUFFALO, NEVV'YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO JARVIS TYPE WRITER AND TABULATOR COMPANY, OF BUFFALO, NEW YORK.

,TYPE-WRITING MACHINE. I l

SPECIFICATION forming part of Letters :Patent No. 712,933, dated November 4, 1902. Application led May 16, 1898. Renewed November 14, 190].. Serial No. 82,249. (No model.)

double type are mounted on ba'r's'arranged infv the form of a circular basket and in which the platen has a longitudinal and a transverse movement with reference to the printing-line; so that either of the-type on a bar may be brought to the printing-line. Some parts of l our improvements are also applicable to other styles of type-writing machines.

The objects of our invention are to sim-4 plify the construction of the devices whereby the platen is supported and moved 4trans-v versely to the printing-line and the devices whereby the platen is rotated, to improve-the construction of the guide which supports the platen-carriage, and to provide an efficient locking device whereby the key-levers are prevented from being operated when the platen has nearly reached the end of a line.

In the accompanying drawings, consisting of seven sheets, Figure 1 is a fragmentary top plan View of our improved type-writing machine. Fig. Zeis a perspective View of the platen supporting and shifting mechanism: Fig. 3 is a fragmentary longitudinal sectioni on an enlarged scale, in line 3 3, Fig. 1, showiing the position of part-s before the key-locking mechanism is operated by the carriage. Fig. 4 is a perspectiveview ofthe tappet whereby the key-locking mechanism is operated. Fig. 5 is a fragmentary perspective view ofthe machine looking from the rear and showing the mechanism whereby the keys are locked. Fig. 6 is a sectional side elevation of the mechanism for turning the platen, the parts beingadjustedfor turning the platen one tooth or space at a time. Fig. 7 is a similar View of the platen and its shifting mechanism and one of the type-bars and its operating mechanism, the platen-shifting mechanism being adjusted for turning the platen two spaces or teeth at a time. Fig. 8 is a fragmentary horizontal section in line 8 8, Fig. 7. Fig. `9 is a detached perspective View of the ball-bearing guide of the platen-carriage. Fig. 10 is a transverse section thereof in line 10 10, Fig. 9. Fig. 11 is a fragmentary longitudinal section thereof in line 11 11, Fig. 10. lar to Fig. 10, showing a modified construction of the ballbearing guide of the platencarriage. Fig. 13 is a fragmentary perspec- -tive view of the key-lever-lockin-g mechanism.

Fig'. 14 is a fragmentary vertical section of the lower portion of the machine, showing the locking mechanism in its operative po- Fig. 12 isa transverse section simisition and holding the key-levers against de- Y -the base and top plate.

B represent-s the cylindrical platen, which is movably supported above the top plate of 'the frame and which supports the paper on its lower side during the operation of writing on the same.

C represents one of the type-bars pivoted on the top plate below the platen and prolvided at its outer end with two. printing types or characters c c and adjacent to its pivot with a crank c2.

D represents one of the key-levers, which is connected with the crank of the type-bar by a rod d for operating the type-bar and which is arranged lengthwise in the lower portion of the frame. The key-lever is pivoted at ils rear end and provided at its front end with a button or finger-piece d and is yieldingly held in an elevated position by a spring cl2.

All of the foregoing parts may be of any suitable or well-known construction.

The platen, as usual, is moved forward intermittently lengthwise of the printing-line as the writing progresses and also transversely to the printing-line to permit either of the types on the type-bar to strike the paper on the platen at the printing-point. The improved mechanism whereby this movement of the platen is effected is constructed as follows:

E represents a primary or longitudinallymovable carriage,which consists, essentially, of a longitudinal rod or bar e and two rearwardly-projecting cross-bars c e2, connected with the ends of the longitudinal bar.

F represents the secondary or transverselymovable carriage,which consists, essentially, of two longitudinal barsffand two crossbars f2f3, connecting the ends of the longitudinal barsff'. The platen is arranged lengthwise in the secondary carriage, and the ends of the platen-shaft I) are journaled in bearings f1 in the cross-bars of the secondary carriage and pass through horizontal slots f5 in the cross-bars of the primary carriage, so that the secondary carriage is coinpelled to move lengthwise with the primary carriage, but is capable of moving transversely independent of the primary carriage. The shaft of the platen is relieved from frictional contact with the cross-bars of the primary carriage by means of rollers g, mounted on said shaft and running on ledges or tracks g on the outer sides of the cross-bars e e2.

g'2 is a link which connects the front portion of one of the cross-bars of the longitudinally-movable carriage with the adjacent cross-bar of the transverselymovable carriage and whereby the platen is held against turning out of alinement during the transverse lnovenlentof the secondary carriage in the primary carriage. The platen is caused to move transversely back and forth uniformly throughout its length by a longitudinal rock-shaft H', journaled in bearings or sleeves h on the rear ends of the cross-bars of the primary carriage and provided at its ends with rock-arms 7L It', which are connected by links h2 h2 with opposite ends of the platen-shaft.

I, Figs. l, 2, and 5, represents a shiftingarm whereby the secondary carriage and the platen mounted thereon are moved transversely. This arm is provided at its upper end with an upwardly-opening fork vl, which receives the front longitudinal bar f of the secondary carriage and is secured with its lower end to a horizontal rock-shaft i', which is journaled in the front posts of the frame lengthwise of the carriages.

f1? is a spring which connects a forwardlyprojecting arm i3 on the rock-shaft t" with a rod f4, forming part of the main frame. This spring turns the shaft and its forked arm in the direction for moving the secondary carriage and platen forwardly and holds these parts yieldingly in the foremost position, in which position the printing-point of the platen isin line with one ofthe types of each type-bar.

J represents a horizontal shiftingrod,which is guided in the front portion of the top plate, as shown in Figs. 1 and 5, and which is pivoted at its rear end to the forked arm and provided in front rof said plate with a button or finger-piece j. Upon pushing this shiftingrod backwardly the secondary carriage and the platen are moved rearwardly and the printing-point of the latter is carried into line with the other type of each type-bar. The transverse movement of the carriage is limited by the engagement of the platen-shaft b with the ends of the slots f5 in the cross-bars e' e2 of the primary carriage, as shown in Figs. 2 and 16. Upon lifting the carriages for inspecting the writing on the under side of the platen the front longitudinal bar of the secondary carriage is disengaged' from the forked rock-arm I, and upon lowering the carriages said longitudinal bar is again engaged with the forked arm. Vhile the carriages move lengthwise as the writing progresses, the front longitudinal bar of the secondary carriage slides lengthwise through the forked arm, so that the platen can be lifted in any position of the carriages.

The primary carriage is supported on its front side by a roller le, which is. pivoted on the longitudinal bar e on the front side of the primary carriage and which runs on a track 7c', arranged on the top plate. The rear portion of the primary carriage is supported and guided in its longitudinal-movement by a guide arranged in rear of the carriages and consisting of a longitudinally-movable guidecase L and a supporting or guide rail L'. The latter is secured upon the top plate in rear of the carriages and lengthwise thereof and is provided with two longitudinal ball-grooves ZZ in its opposite vertical sides. The guidecase consists of a plate Z', arranged above the guide-rail, and two longitudinal anges Z2 Z3, depending from the plate. These flanges are arranged on opposite sides of the guiderail and are provided with ball-grooves Z4 Z4 on their inner sides, which face the ball-grooves of the guide-rail.

Z5 represents balls arranged between the grooves in the guide-rail and the grooves in the guide-flange, a pair of these balls being preferably arranged between each groove in the rail and the adjacent iiange. The grooves in the rail are so constructed that the balls engage with the same near their axes, and the grooves in the anges are so constructed that the balls engage With the balls more remote from the axis, which causes the balls as they are turned by a considerable movement of the guide-case to roll on the guiderail only a small extent, thereby permitting of employing a comparatively short guiderail. One of the depending flanges is made IIO integrally with theplate of the guide-case, while the other is ad justably connected therewith by screws Z6, passing through slots Z7 in the plate, whereby any Wear may be taken up. The balls on each side of the rail are held apart so as lto properly support the guide-case on the rail by a separating rod or bar Z8, provided at opposite ends with eyes Z9, which loosely embrace the Vballs of eachpair. The balls are prevented from escaping from the ball-grooves by means of stops or screws Z10 Z11,arranged on the guide-rail and flan ges at the ends of the ball-grooves therein. The guidecase is provided on its front side with two forwardly-projecting ears or lugs Z12, in which the sleeves Zz of the primary carriage turn, and thereby pivotallyconnect the carriage with the guide, so as to permit both carriages to be raised for inspecting the writing. Each of these vlugs Z12 consists of an inner section Z13, which is fixed on the guide L, and an outer section Z11, which is attached by screws Z15 to the o uter side of the inner section, as shown in Figs-l and 16. The sections Z13 Z14 of each lug Z12 are provided with coinciding circular openings Z16 Z17, respectively, through which the rock-shaft H passes. y The opening in the outer section is larger than the opening in the inner section, thereby forming an outwardly-facing shoulder Z11S between the sections, as shown in Fig. 16. The adjacent bearing-sleeve Zt of the primary carriage Ais journaled in the opening of the outer lug-section and bears with its inner end against the shoulder Z111. The opening Z1(i inthe inner section is larger than the diameter of the rockshaft H, so that the latter does not engage therewith. The two bearing-sleeves h by engaging with the outer sides of the inner lugsectious Z13 compel the primary carriage and guideL to move together. This means of p ivotally connecting the primary carriage with the guide L andjourualing the rock-shaft H permits the carriages to be freely raised and lowered without affecting the Vmechanism whereby the platen vis shifted transversely, and it also leaves theshaft H perfectly free from any pressure or weight, thereby permitting the same to turn easily for shifting the platen transversely. This construction of a ball-bearing guide holds the platen securely in place and reduces the wear upon the guide to a minimum, thereby insuring proper alinement of the platen. Y

Instead of arranging theA plate which connects the guide-flangeson topof the guiderail, as shown in Figs. 9, 10, and ll, thisconnecting-plate may be arranged on the lower side of the guide-rail, ,iny which construction the case is secured to the top plate of the main frame and theguide-rail is connect-ed with the4 primaryicarriage, as shown in Fig. 12. This means ofrsupportiug and shifting v the platen and connecting parts is extremely simple and light, owing to the small number of parts, therebypermitting the machine to be operated with greater ease and speed.

The mechanism whereby the platenY is rotated andheldpin its shifted` position is constructed as follows:

M represents a ratchet-wheel secured to the platen or its shaft, and m is a ratchet-lever provided with a pawl m', which is pivoted to the upper arm m2 of the ratchet-lever and which is adapted to engage withV the ratchet-wheel for turning the platen. This ratchet-lever is pivoted on the secondarycarriage and is normally turned backward for disengaging its pawl from the ratchet-Wheel by the preponderating weight of the lower arm m3 of the ratchet-lever, this backward movement of the lever being limited by the adjacent longitudinal bar e of the primary carriage, with which the lowerarm m3 engages. The ratchet-lever m may b e pivoted to any suitable or convenient part of the secondary carriage, the same as shown in the drawings, Figs. 1, 6, 7, and 16, being pivoted to the paper-guide-supporting rod M', Vwhich is mounted on the secondary carriage in front of the platen. Upon raising the lower arm of the ratchet-lever the pawl on itsv upper arm engages with the adjacent tooth of the ratchet-wheel and turns the platen until the forward movement of the ratchet-lever is arrested, whichis preferably effected by a stop m4, secured to the upper arm m2 and engaging with the adjacent tooth of the ratchetwheel. For the purpose of varying the turning lof the platen and the space between the lines of writing thelposition lof the ratchetpawl is adjusted so that a greateror less amount of dead movement of the pawl isproduced during the first portion ofl the forward stroke of the latter, thereby varying the eX- tent of the effective or last portion of the forwardmovement of the pawl. ArThe position of the pawl is controlled byan adjusting-lever n, which is pivoted on the upper arm of theA ratchet-lever and provided on its rear arm with a finger or stop n", which engages with theunder side of the pawl. The pawl is yieldingly held in engagement with the stop by a spring n2. Upon turning the adjusting-lever so that the stop n and the pawl resting thereon are raised considerably, as shown in Figli, the pawl upon being carried forwardly by the ratchet-lever moves dead or idle a considerable portion of its forward movement before it engages with va tooth of the ratchet-wheel, this dead or idle movementV being so determined thatf-the pawl after engaging with the ratchet-tooth can only turn the platen the extentof one tooth or space during the effective or last portion of its forward movement. Upon turningtheadjusting-lever so that the stop 'n' and the pawl resting thereon are lowered, as shown in Fig. 7, the extent of the idle portion of the ratchet-lever is reducedl and the pawl engages a tooth of' the` ratchet-wheel, which is arranged two spaces in advance of the stopping-point, so that the.

platen during the last portion of the forward movement of the ratchet-lever is turned the IOO IIO

extent of two teeth or spaces. The pawl when in its retracted position rests on the stop n' and is wholly disengaged from the ratchet-wheel; but in its projected position the pawl engages with the ratchet-wheel and is wholly disengaged from the stop n. The adj usting-lever is preferably held in its adjusted position by a depending spring plate or lug n3, formed on the adjusting-lever and provided with two notches or recesses n4, as shown in Fig. 8, either of which may be engaged with a projection a5 on the ratchet-lever. Upon turning the adjusting-lever when the projection engages with one of its notches the spring-plate is deflected until the next notch reaches the projection,when the plate again springs back and holds the adjusting-lever in its shifted position. .As the pawl of the ratchet-lever is wholly disengaged from the ratchet-wheel when the ratchet-leveris retracted, the platen can be turned freely backward or forward by means of the thumb-pieces or buttons n at the ends of the platen-shaft for the purpose of making corrections or interlineations in the writing.

The platen may be yieldingly held against turning by a detent device of any suitable and well-known construction. The detent device shown in Figs. l, 6, 7, and 17 consists of an elbow-lever o, pivoted to an upward extension of the side bar f2, so as to swing in a vertical plane. The upper arm of this lever projects horizontally inward and is provided with a roller, which is yieldingly held in engagement with the teeth of the ratchet-wheel by a spring o', secured to the cross-barf2 and bearing against the lower depending arm of the elbow-lever O.

P represents the spring-drum,which is connected by a strap p with the guide-case L and whereby the carriages and connecting parts are moved forward.

Q Q represent the toothed bar and the pawls, respectively, of the escapement mechanism, whereby the intermittent forward movement of the carriages and platen is controlled and which may be of any suitable and well-known construction. The toothed escapement-bar is arranged lengthwise in rear of the ball-bearing guide and is provided with two forwardly-projecting arms q q, which are pivoted to ears q q on the rear side of the ball-bearing case, so that the escapement-bar can be raised out of and lowered into engagement with the escapementpawls. The escapement-bar is yieldingly held with its teeth in engagement with one of the escapement-pawls by a spring q2.

Q3 is a shifting-lever, whereby the escapement-bar is lifted out of engagement from the escapement-pawls at the same time that the platen is turned forward preparatory to moving the platen for beginning a new line. This shifting-lever is pivoted on one of the crossbars of the primary carriage and is arranged with its front arm Q4 over the lower arm of the ratchet-lever, while its rear arm Q5 is arranged on an arm q, which projects from the escapement-bar in front of the pivot thereof. When the platen has nearly reached the end of a line, the key-levers are prevented from being depressed by a locking mechanism, which is constructed as follows:

R is a locking bar or plate, which is arranged transversely underneath the front portions of the key-levers and which is pivoted at its ends near one of its longitudinal edges to the base of the main frame, so that the locking-bar can swing in a vertical plane. Until the platen has nearly reached the end of the line the locking-plate stands in a horizontal position, as shown in Fig. l5, which leaves an unobstructed space below the keylevers and permits the same to be depressed for writing. When the platen has nearly reached the end of the line, the locking-bar is automatically turned into a vertical position, so that its outer or free longitudinal edge stands close to the under side of the key-levers, as shown in Fig. 14, whereby the keys are prevented from being depressed.

r is a spring which constantly tends to turn the locking-plate into its raised or operative position.

S represents a main retaining-catch, whereby the locking-plate is held in its depressed or inoperative position and which is pivoted to a bracket s on the base so as to swing in a horizontal plane. This catch is provided at its front end with a dat under side s/ and an inclined upper side s2 and is yieldingly held in the path'of the locking-plate by a spring s3.

T represents a trip-lever, which is turned by a tappet U on the escapement-bar or some part connected with the carriage and whereby the main catch is released from the lockingplate. portion of the top plate adjacent to the escapement-pawls, so as to swing inV a vertical plane, and its movement is transmitted to the main catch by any suitable means, the means shown in the drawings consisting of an upper arm t of the trip-lever and turns the same in the direction for disengaging the main retaining-catch from the locking-piate,\vl1e1eby the latteris released and is free to be raised by a spring rinto its operative position, thereby preventing the depression of the key-levers. The position of the tappet on the escapementbar is such that the key-levers are locked before the platen hasreached the extreme end of the line, thereby making it possible to Write a. few more letters at the end of the line in order IDO This trip-lever is pivoted on the rear ITC into itsinoperative position by a shifting-rod o, which is'pivoted at .its lower end to the locking-plate eccentric to the pivot of the latter and provided in its upper end with a longitudinal slot fu', whichreceives a screw or projection o2 on the lower end of a restoring Y button or key o3. The latter is normally held y slot 'u' of the shifting-bar.

in an elevated position, with its screw or pro jectionvat the upper 'end of the slot in the shifting-bar, bya lifting-arm c4, pivotally conf necting ythe ,lower end of the restoring-key with theframe,- and a spring @5, connecting said arm with the frame. vVthen the lockingplate is raised into an operative'position, the shifting-bar is also raised, so that the pin of the restoring-key is in the lower end of the Upon depressing the restoring-key when the parts are in this position the pin of the key c3 bears against the lower end of the slot o and moves the shifting-bar downwardly, together with the locking-plate. As the locking-plate is depressed it delects the main catch by engaging against the inclined upperV side thereof, and after passing below the latterthe catch is again moved forward by the spring into its normal position, so that thev main' catch en-l Y ble to resume writing. In order to prevent such an occurrence, an auxiliary catch w is provided, which holds ythe locking-plate in a depressed position when the main catch is f held in a retracted position by thetappet.

i ingly held in its foremost position on the main Theauxiliary'catch is vpreferably pivoted concentric .with the main catch and is arranged on the opposite side of the pivot, so Y that when the main catchis withdrawn fromand passing through a segmenatal slot 104 in I the main catch. The auxiliary catch is yieldcatchby a springwi", secured to the main catch and bearing againstthe pin of the aux n iliary catch. t The under side'of the auxiliary i catch is lower than the' under' side of the 'the same.

main catch, so that upon retracting the latter for the purpose of allowing the locking-plate to be raised into an operative position the auxiliary catch cannot pass with its flat under side over the locking-plate and prevent itsrising. Ordinarily the main catch after being withdrawn for releasing the' locking-plate immediately returns to its normal position into the path of the locking-plate, so that it catches the latter upon being depressed. however, the main catch is held in a retracted position by the tappeti, the locking-plate when depressed is caught by the auxiliary catch, which at this time is projected into the path gf the locking-plate. When the tappet subsequently clears the trip-lever, the main catch swings forward over the locking-plate and the auxiliary catch is retracted from above The tappet is pivoted on a supporting-block u and is held against turning in one direction when engaging the trip-lever by a pin u', arranged on the block and engaging with one end of a slot u2 in the tappet, and is yieldingly held against movement in the opposite direction to permit the tappet toride over the trip-lever on the return movement ofthe'platen by a spring n3, secured to the block and bearing against the tappet. The supporting-block is'adjustably secured lby a screw n4 to the escapement-bar, so as i permit of varying the point at which the locking of the key-levers is effected.

We claim as our inventionl.v The combination with the primary cai` riage having a longitudinal movement and provided in its cross bars `with horizontal guideways, and the secondary carriage capable of longitudinal and transversemovement and provided in its cross-bars with bearings which are in line with said guideways, of a platen provided with a shaft journaled in said b'earin gs and movable transversely along said horizontal guideways, a vertically-,swinging link connecting the primary carriage and the secondary carriage, and a shifting device Whereby the secondary carriage andthe platen are moved transversely in the primary carriage, substantially as set forth.

2. rI he combination with the primary carriage having a longitudinal movement and provided on its cross-bars with transverse Quideways, and the secondary carriage having a transverse and a longitudinal movement and provided on its cross-bars with bearings,

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of a platen provided with a shaft which is f.

of swinging vertically independent thereof, a secondary carriage capable of longitudinal and transverse movement and provided on its cross-bars with bearings, a platen provided with a shaft which is journaled in said bearings and which passes through transverse slots in the cross-bars of the primary carriage, rollers arranged ou the platen-shaft and ruiming on transverse tracks arranged lo on the cross-bars of the primary carriage, a

rock-shaft extending concentrically through the pivot connecting the primary carriage and the guide, rock-arms arranged on the rock-shaft, and links connecting said rockarms with the platen-shaft, substantially as set forth.

4. Thecombination wilh the main frame and the type-bars each of which is provided with two letters, of a platen-carriage capable zo of a longitudinal and a transverse movement and also of an upward and a downward movement, a rock-shaft journaled in the upper part of the main frame, a rock-arm mounted on the rock-shaft and provided with an upwardly-opening fork, a horizontal shiftprovided with a ratchet-wheel, of a ratchetlever provided with a fixed stop which engages with the ratchet-wheel to limit the forward movement of said lever, a pawl pivoted on said lever and adapted to engage with the 4o teeth on the ratchet-wheel for feeding the platen upon turning the lever, and an adjustable stop which is mounted on said lever and whereby the pawl is caused to engage with the ratchet-wheel during a shorter or a longer portion of the throw of the lever, said adjustable stop being engaged by the pawl while the latter is in its retracted position and disengaged from the ratchet-wheel but disengaged from the pawl while the latter is in 5o its projected position and in engagement with the ratchet-wheel, substantially as set forth.

6. In a type-writing machine, the combination with the rotary platen provided with a ratchet-wheel, of a ratchet-lever provided with a pawl adapted to engage with the teeth of the ratchet-wheel for turning the platen, an adjusting-lever pivoted on the ratchet-lever and provided with a stop which engages with said pawl, a projection arranged on the 6o ratchet-lever, and a spring-plate arranged on the adjusting-lever and provided with a number of notches which are adapted to receive said projection for holding the adjusting-le- Ver in postion, substantially as set forth.

7. The combination with the main frame,

' the platen-carriage, and the vertically-movable key-levers, of a locking-plate pivoted transversely to the main frame below the keylevers, a spring whereby the locking-plate, when free, is turned up into engagement with the under side of thekey-levers to prevent the depression thereof, a horizontallymovable catch mounted on the main frame and adapted to engage with the locking-plate for holding the same in a lowered or inoperative position, a vertically-swinging trip-lever pivoted on the frame and connected with the catch, and a tappet arranged on the carriage and adapted to engage with the trip-lever for turning the same and disengaging the catch from the locking-plate, substantially as set forth.

S. In a type-writing machine, the combination with the main frame, the platen-carriage and the key-levers,of a locking-plate arranged transversely below the key-levers and pivoted to the main frame, a spring whereby the locking-plate is raised into engagement with the under side of the key-levers, a main catch and an auxiliary catch arranged toengage alternately with the locking-plate and hold the same in a depressed position and intermediate` connecting mechanism whereby the catches are controlled by the platen carriage, substantially as set forth.

9. In a type-writing machine, the combination with the main frame, the platen-carriage and the key-levers,of a locking-plate arranged transversely below the key-levers and pivoted to the main frame, a spring whereby the locking-plate is raised into engagemerlt with the under side of the key-levers, a main catch and an auxiliary catch pivoted concentrically and arranged on opposite sides of the pivot so that the catches can be engaged alternately with thelocking-plate, aspringyieldingly connecting the catches so that one catch can turn independently of the other catch, and intermediate connecting mechanism whereby the catches are controlled by the platen-carriage, substantially as set forth.

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l0. Inatype-writing machine,the combination with the main frame, the platen-'carriage transversely below the key-levers and pivoted to the main frame, a spring whereby the locking-plate is raised into engagement with the under side of the key-levers, a restoring-key whereby the locking plate is depressed, a catch whereby the locking-plate is heldin a depressed position,and intermediate mechanism wherebyv the platen-carriage disengages the catch from the locking-plate, substantially as set forth.

ll. In a type-writing machine the combination with the main frame, the platen-carriage and the key-levers,of a locking-plate arranged transversely below the key-levers and pivoted to the main frame, a spring whereby the locking-plate is raised into engagement with the under side of the key-levers, a shifting-bar pivoted at one end to the locking-plate, a restoring-key provided with a projection engaging with a slot in the other end of the shifting-bar, a lifting-link connected with the restoring-key, a spring whereby the restoring- VVit'ness our hands this 26th day of April,l key and lifting-link are raised, acateh Where- 1898. i by the locking-plate is heldin adepressed po- HAROLD JARVIS.

` sition;and'iutermediate mechanism whereby MANLEY H.BLAKESLEE.

the movement of the platen-carriage disen- VitneSSeS: gages the catch from'the locking-plate, sub- CARL F. GEYER,

stantially as Set forth. THEO. L. POPE.